We have found that KK 246 , the only confirmed galaxy located within the nearby Tully Void , is a dwarf galaxy with an extremely extended H i disk and signs of an H i cloud with anomalous velocity .
It also exhibits clear misalignment between the kinematical major and minor axes , indicative of an oval distortion , and a general misalignment between the H i and optical major axes .
We measure a H i mass of 1.05 \pm 0.08 \times 10 ^ { 8 } M _ { \sun } , and a H i extent 5 times that of the stellar disk , one of the most extended H i disks known .
We estimate a dynamical mass of 4.1 \times 10 ^ { 9 } M _ { \sun } , making this also one of the darkest galaxies known , with a mass-to-light ratio of 89 .
The relative isolation and extreme underdense environment make this an interesting case for examining the role of gas accretion in galaxy evolution .